What is the use of Bluetooth serial assistant (I have seen this software in Android software),

Bluetooth client communication tool (that is, Bluetooth slave mode) can test Bluetooth serial communication. Can connect the Bluetooth serial port of single chip microcomputer and PC.

Bluetooth serial assistant for mobile phone is a J2ME program, which can run on mobile phones supporting Bluetooth and J2ME. With the cooperation of Bluetooth to serial port module, serial port devices, such as modem and LCD screen, can be controlled on the mobile phone.

Simply put, you don't have to care too much about this tool. IT is a developer's tool to connect your mobile phone and other IT devices.

When your computer needs to control your mobile phone to make calls and send short messages via Bluetooth, it uses the Bluetooth serial port (com) channel. Your mobile phone can turn off the computer via Bluetooth, which is also a Bluetooth serial channel.

Don't worry too much, these functions are better realized by special software and don't need to be developed.